Preparation method of starch milk for saccharification

Abstract

The invention discloses a preparation method of starch milk for saccharification and belongs to the technical field of glutamic acid production. The method comprises a crude starch milk concentration process: performing concentration and water removal on crude starch milk by using a water removal and concentration device to obtain concentrated starch milk containing starch, protein and water; and the water removal and concentration device comprises at least one first-stage water removal unit, a second-stage water removal unit, a third-stage water removal unit and a concentrator, wherein the plurality of first-stage water removal units are arranged in parallel. The preparation method of the starch milk has the beneficial effects that protein separation is omitted in the preparation method of the starch milk, the crude starch milk is concentrated by creatively utilizing the water removal and concentration device on the premise that washing water does not need to be added, and water-soluble protein can smoothly enter fermentation through saccharification, so that required nutrients are provided for fermentation; the non-water-soluble protein can be smoothly separated from the sugar liquid and the water-soluble protein in the filter pressing process through the existing saccharification process, so that the non-water-soluble protein is prevented from entering the fermentation process to influence the product quality.

Description

Technical field: [0001] The invention belongs to the technical field of glutamic acid production, and more specifically relates to a method for preparing starch milk for saccharification. Background technique: [0002] Corn starch milk is a milky product mainly composed of starch formed by pulping starch after degerming and peeling, fiber and protein separation; the preparation of corn starch milk includes corn cleaning, soaking, corn coarse crushing, germ separation, and corn grinding , starch sieving, protein separation and starch washing, centrifugal separation and drying; [0003] (1) Simply use a gluten concentrator for processing, because the gluten density is small and the particles are small, often due to the overflow of the concentrator, some small gluten particles will be taken away, resulting in a high content of suspended matter in the overflow (process water). When the concentration of incoming gluten water is too low, the concentration operation is more diffic...

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Problems solved by technology

[0009] In order to solve the above problems and overcome the deficiencies in the prior art, the present invention provides a method for preparing saccharified starch milk, which can effectively solve the waste of water-soluble protein caused by protein separation. If protein separation is not used, starch washing process must be used, that is, continuous The use of washing water for washing, but this will inevitably lead to the production of process water containing a large amount of soluble protein and insoluble protein, while the process water of the prior art either enters the sewage treatment system, or is used for washing germ, fiber, filter cloth And the process water for soaking corn; this will inevitably have a great impact on the quality and light transmittance of the product

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